<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/73800>73800</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Changing borrowed range status of test class does not change outcome of test (std::ranges::transform_view)
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          hawkinsw
      </td>
    </tr>
</table>

<pre>
    In the CTAD tests for `std::ranges::transform_view`, changing whether the `BorrowedRange` test class is a actually borrowed does not seem to change the outcome of the tests. In other words, if I remove the `enable_borrowed_range` on lines 37 and 38 [1], the test still seems to pass. I am _sure_ that I am missing something, but would love to be educated on what that is!

Once I understand the problem, I would absolutely *love* to help fix it! 

[1] https://github.com/llvm/llvm-project/blob/9b192596ded4982ea360e70f723f9d05dc456ec0/libcxx/test/std/ranges/range.adaptors/range.transform/ctad.compile.pass.cpp#L37

> Note: This situation appears to happen for the `site::ranges::join_view`, too, but I haven't confirmed that locally.


</pre>
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